From 7286b2518ec8e4398b512ce95def9166a7af2e4a Mon Sep 17 00:00:00 2001 From: Deepak S Date: Thu, 13 Jul 2017 21:26:50 -0700 Subject: Adding PROX(Packet pROcessing eXecution engine) VNF to sampleVNF JIRA: SAMPLEVNF-55 PROX is a DPDK-based application implementing Telco use-cases such as a simplified BRAS/BNG, light-weight AFTR... It also allows configuring finer grained network functions like QoS, Routing, load-balancing... (We are moving PROX version v039 to sampleVNF https://01.org/intel-data-plane-performance-demonstrators/prox-overview) Change-Id: Ia3cb02cf0e49ac5596e922c197ff7e010293d033 Signed-off-by: Deepak S --- VNFs/DPPD-PROX/genl4_stream_udp.c | 165 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 165 insertions(+) create mode 100644 VNFs/DPPD-PROX/genl4_stream_udp.c (limited to 'VNFs/DPPD-PROX/genl4_stream_udp.c') diff --git a/VNFs/DPPD-PROX/genl4_stream_udp.c b/VNFs/DPPD-PROX/genl4_stream_udp.c new file mode 100644 index 00000000..3de2db09 --- /dev/null +++ b/VNFs/DPPD-PROX/genl4_stream_udp.c @@ -0,0 +1,165 @@ +/* +// Copyright (c) 2010-2017 Intel Corporation +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. +*/ + +#include "genl4_stream_udp.h" +#include "mbuf_utils.h" + +int stream_udp_is_ended(struct stream_ctx *ctx) +{ + return ctx->cur_action == ctx->stream_cfg->n_actions; +} + +static void update_token_times(struct stream_ctx *ctx) +{ + uint64_t now = rte_rdtsc(); + + token_time_update(&ctx->token_time_other, now); + token_time_update(&ctx->token_time, now); +} + +int stream_udp_proc(struct stream_ctx *ctx, struct rte_mbuf *mbuf, struct l4_meta *l4_meta, uint64_t *next_tsc) +{ + update_token_times(ctx); + + if (l4_meta) { + enum l4gen_peer peer = ctx->stream_cfg->actions[ctx->cur_action].peer; + plogx_dbg("Consuming UDP data\n"); + /* data should come from the other side */ + if (peer == ctx->peer) { + plogx_err("Wrong peer\n"); + return -1; + } + /* Fixed length data expected */ + if (ctx->stream_cfg->actions[ctx->cur_action].len != l4_meta->len) { + plogx_dbg("unexpected UDP len (expected = %u, got = %u, action = %u)\n", + ctx->stream_cfg->actions[ctx->cur_action].len, + l4_meta->len, + ctx->cur_action); + + return -1; + } + /* With specific payload */ + if (memcmp(ctx->stream_cfg->data[peer].content + ctx->stream_cfg->actions[ctx->cur_action].beg, l4_meta->payload, l4_meta->len) != 0) { + plogx_dbg("Bad payload at action_id %d, with peer = %d and pos = %d and len=%d\n", ctx->cur_action, peer, ctx->cur_pos[peer], l4_meta->len); + return -1; + } + ctx->cur_pos[peer] += l4_meta->len; + ctx->cur_action++; + + if (stream_udp_is_ended(ctx)) + return -1; + + token_time_take(&ctx->token_time_other, mbuf_wire_size(mbuf)); + /* Time before next packet is expected to + arrive. Note, addition amount of time is accounted + for due to rate limiting. */ + uint64_t wait = token_time_tsc_until_full(&ctx->token_time_other); + *next_tsc = wait + ctx->stream_cfg->tsc_timeout; + } + + if (ctx->stream_cfg->actions[ctx->cur_action].peer != ctx->peer) { + const char *other_peer_str = ctx->peer != PEER_SERVER? "server" : "client"; + + plogx_dbg("Expecting more UDP data from %s, will expire = %s\n", other_peer_str, l4_meta == NULL? "yes" : "no"); + if (!l4_meta) { + ctx->flags |= STREAM_CTX_F_EXPIRED; + } + return -1; + } + + uint64_t wait_tsc = token_time_tsc_until_full(&ctx->token_time); + + if (wait_tsc != 0) { + plogx_dbg("Wait = %"PRIu64"\n", wait_tsc); + *next_tsc = wait_tsc; + return -1; + } + + const struct stream_cfg *stream_cfg = ctx->stream_cfg; + + uint8_t *pkt = rte_pktmbuf_mtod(mbuf, uint8_t *); + const struct peer_action *act = &stream_cfg->actions[ctx->cur_action]; + + uint16_t pkt_len = stream_cfg->data[act->peer].hdr_len + sizeof(struct udp_hdr) + act->len; + + rte_pktmbuf_pkt_len(mbuf) = pkt_len; + rte_pktmbuf_data_len(mbuf) = pkt_len; + plogx_dbg("Creating UDP data (peer = %s, payload len = %u)\n", act->peer == PEER_CLIENT? "client" : "server", act->len); + /* Construct the packet. The template is used up to L4 header, + a gap of sizeof(l4_hdr) is skipped, followed by the payload. */ + rte_memcpy(pkt, stream_cfg->data[act->peer].hdr, stream_cfg->data[act->peer].hdr_len); + rte_memcpy(pkt + stream_cfg->data[act->peer].hdr_len + sizeof(struct udp_hdr), stream_cfg->data[act->peer].content + act->beg, act->len); + + struct ipv4_hdr *l3_hdr = (struct ipv4_hdr*)&pkt[stream_cfg->data[act->peer].hdr_len - sizeof(struct ipv4_hdr)]; + struct udp_hdr *l4_hdr = (struct udp_hdr*)&pkt[stream_cfg->data[act->peer].hdr_len]; + + l3_hdr->src_addr = ctx->tuple->dst_addr; + l3_hdr->dst_addr = ctx->tuple->src_addr; + l3_hdr->next_proto_id = IPPROTO_UDP; + l4_hdr->src_port = ctx->tuple->dst_port; + l4_hdr->dst_port = ctx->tuple->src_port; + l4_hdr->dgram_len = rte_bswap16(sizeof(struct udp_hdr) + act->len); + /* TODO: UDP checksum calculation */ + l3_hdr->total_length = rte_bswap16(sizeof(struct ipv4_hdr) + sizeof(struct udp_hdr) + act->len); + ctx->cur_pos[ctx->peer] += act->len; + ctx->cur_action++; + + /* When the stream has ended, there is no need to schedule + another timeout (which will be unscheduled at the end of + the stream). */ + if (stream_udp_is_ended(ctx)) + return 0; + + token_time_take(&ctx->token_time, mbuf_wire_size(mbuf)); + + /* Send next packet as soon as possible */ + if (ctx->stream_cfg->actions[ctx->cur_action].peer == ctx->peer) { + *next_tsc = token_time_tsc_until_full(&ctx->token_time); + } + else { + uint64_t wait = token_time_tsc_until_full(&ctx->token_time_other); + *next_tsc = wait + ctx->stream_cfg->tsc_timeout; + } + + return 0; +} + +uint16_t stream_udp_reply_len(struct stream_ctx *ctx) +{ + if (stream_udp_is_ended(ctx)) + return 0; + else if (ctx->stream_cfg->actions[ctx->cur_action].peer == ctx->peer) + return 0; + else + return ctx->stream_cfg->data[ctx->stream_cfg->actions[ctx->cur_action].peer].hdr_len + sizeof(struct udp_hdr) + + ctx->stream_cfg->actions[ctx->cur_action].len; +} + +void stream_udp_calc_len(struct stream_cfg *cfg, uint32_t *n_pkts, uint32_t *n_bytes) +{ + const uint32_t client_hdr_len = cfg->data[PEER_CLIENT].hdr_len; + const uint32_t server_hdr_len = cfg->data[PEER_SERVER].hdr_len; + + *n_pkts = 0; + *n_bytes = 0; + + for (uint32_t i = 0; i < cfg->n_actions; ++i) { + const uint32_t send_hdr_len = cfg->actions[i].peer == PEER_CLIENT? client_hdr_len : server_hdr_len; + uint32_t len = send_hdr_len + sizeof(struct udp_hdr) + cfg->actions[i].len; + *n_bytes += (len < 60? 60 : len) + 24; + (*n_pkts)++; + } +} -- cgit 1.2.3-korg